<!DOCTYPE html>
<svg>
  <filter id="lightless" x="0" y="0" width="1" height="1">
    <feDiffuseLighting lighting-color="blue"/>
    <feColorMatrix values="1 0 0 0 0,
                           0 1 0 0 0.5,
                           0 0 1 0 0,
                           0 0 0 1 1"
                   color-interpolation-filters="sRGB"/>
  </filter>
  <rect width="100" height="100" fill="red" filter="url(#lightless)"/>
</svg>
